Not sure there is a clear distinction being made between 'didn't get' and 'didn't like'
I agree...
I didn't like the manufactured pop stuff/artists that was Stock, Aitken, and Waterman, which paved the way for it to be acceptable to hype something up and convince the public that they like it (which is why we have to put up with the xfactor now!).
However, I didn't get the whole reggae thing in the 70's monkey spanner, desmond decker, and all of the Uptight stuff - maybe I don't have the right rhythm?
I also didn't get the Beatles either!
And even though it is on my ipod, I still don't quite get the late Pink floyd stuff, it seems like they weren't quite sure how to top the success of Dark Side of the Moon - which was, and still is, a timeless classic
I think early Genesis were way ahead of their time which is why a lot of people didn't get them, and when their time did arrive, Phil was off doing his own thing and they missed the boat. But the early stuff, although it seems a bit dated is still relevant.